Variable Phase and Frequency Pulse-Width Modulation Technique

Abstract

Phased array systems rely on the production of an exact carrier frequency to function. Reconstructing digital signals by specified amplitude and phase is accomplished explicitly by inducing frequency shifts away from a base frequency implied by phase changes. Shifting the carrier frequency of a digitally controlled phased array while preserving the timing of the individual phase pulses enables more efficient driving of the phased array system when the phase of the drive signals change dynamically in time.

1 - 12 . (canceled) 
     
     
         13 . A system comprising:
 a digital electrical signal having a state, wherein the state is calculated by comparing a difference between a current position in a base frequency cycle and an instantaneous phase angle to a proportion of cycle duty that would be present at the base frequency cycle.   
     
     
         14 . The system of  claim 13 , further comprising a polynomial spline having a plurality of intervals, and wherein at least one of the plurality of intervals is a base frequency period. 
     
     
         15 . The system of  claim 13 , further comprising a polynomial spline having a plurality of intervals, and wherein at least one of the plurality of intervals is a power-of-two count of base frequency periods. 
     
     
         16 . The system of  claim 13 , further comprising a polynomial spline having a plurality of intervals, and wherein at least one of the plurality of intervals is a power-of-two fraction of a base frequency period. 
     
     
         17 . The system of  claim 13 , wherein the electrical signal has a phase angle, and wherein the phase angle is modified by a rolling counter incremented by a value driven by an external environmental monitoring sensor. 
     
     
         18 . The system of  claim 13 , wherein the electrical signal has a phase angle, and wherein the phase angle is modified by a rolling counter decremented by a value driven by an external environmental monitoring sensor.